A: Do you know _______ for advice when we have problems.

B: You can talk to your parents or teachers. [ ]

A. who to talk

B. when to talk to

C. who to talk to

D. who can we talk to

目前，证券交易通道包括( )。

A．证券营业网点柜台服务

B．网上交易

C．电活委托自助式交易

D．证券投资咨询服务